html {
    height: 100%;
}

body {
    background-image: linear-gradient(-20deg, #b721ff 0%, #21d4fd 100%);
}

.main {
    user-select: none;
    background-color: rgba(255,255,255,0.6);
    border-radius: 10px;
    box-shadow: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);
    position: absolute;
    overflow: hidden;
    left: 50%;
    top: 50%;
    width: 700px;
    height: 480px;
    margin-left: -350px;
    margin-top: -240px;
}

.sign-in{
    text-align: center;
    position: absolute;
    left: 0px;
    top: 15%;
    width: 50%;
}

.sign-in a {
    display: inline-block;
    color: #333;
    margin: 10px 0px 10px 0px;
}

.about {
    text-align: center;
    position: absolute;
    right: 0px;
    width: 50%;
    height: 100%;
    background-color: rgba(244,244,244,0.2);
}

.login {
    position: relative;
    top: 20%;
}

.login input {
    background-color: #eee;
    outline: none;
    border: none;
    border-radius: 20px;
    padding: 12px 15px;
    width: 80%;
}

button {
    width: 90px;
    height: 40px;
    margin-left: 10px;
    margin-right: 20px;
    border-radius: 20px;
    border: none;
    background: linear-gradient(90deg, #9090ff, #7070ff);
    outline: none;
    cursor: pointer;
    transition-duration: 100ms;
}

button:hover {
    background: linear-gradient(90deg, #7070ff, #9090ff);
    color: #b721ff;
}